I'm just now installing the Gemini 2 on my long suffering GM8 mount and was more than alarmed with the clearance issue between the dove tail and RA motor when the scope is aimed at the zenith. I guess I should have anticipated this issue seeing how the drive motors hang out roughly twice the distance from the mount than the older stepping motors.

Not having access to the zenith and a good part of the meridian from the east side of the mount is a major problem if you are doing tempral timelapse videos of the sun or planets. Just as important is the potential of destroying the drive motor while manually moving the scope.